My 3 week old is tongue tied. His doctor said there's no proof that cutting it will help his latch.…

My 3 week old is tongue tied. His doctor said there's no proof that cutting it will help his latch. He struggles to latch onto his bottles and pacifier. He tries so hard to drink from his bottles. He ends up latching to the bottles but milk constantly dribbles out the side of his mouth. He also takes up to an hour to drink 3oz of milk. He keeps letting go the bottle because of the tie. Is there anything I can do to help him? He's gaining weight that's another reason they are not concerned.